No, that's not what it says. You said: "and people who are violent often, if not generally, fall into the category of "abnormal," insomuch as an FMRI can see lack of function in areas of the brain." Article 1 says, in summary: Violent schizophrenics have a decreased function of frontal lobe activity compared to non-schizophrenics, but a different decreased function when compared to violent anti-social/depressives. Unfortunately the rest of the article is tucked behind a paywall, but you can believe that 68 citations in 10 years is not exactly ground-breaking, widely believed or widely impactful science. Article 2 says, in summary: A jury should understand precisely what fMRI measures and the extent to which conclusions can be drawn from these sources in order to make informed decisions. It lists ways in which reduced functioning in various areas may be linked to violent activity. You'll noticed this is not a localized, clear-cut account. It also says nothing of violent offenders often, if not generally, having abnormal fMRI scans. What is being shown is more the opposite: that when individuals have cognitive impairments in particular areas, they may be less in control of their decisions and more likely to commit violent acts. What you're saying is that often violent offenders have a cognitive impairment. If I told you that all tall men wear hats, you should probably not conclude that men who wear hats are often tall.